<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>
      <!-- 步骤条 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- 表单 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <!-- 标签页 -->
        <el-tabs
          :tab-position="'left'"
          v-model="activeIndex"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="cateList"
                :props="cascaderProps"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyList"
              :key="item.attr_id"
            >
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                  border
                  size="mini"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyList"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="uploadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headersObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
              <!-- 富文本编辑器 -->
              <quill-editor v-model="addForm.goods_introduce"></quill-editor>

              <!-- 添加按钮 -->
              <el-button type="primary" class="btnAdd" @click="addProduce">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 预览对话框 -->
    <el-dialog
      title="预览图片"
      :visible.sync="previewVisible"
      width="50%"
    >
     <img :src="previewUrl" alt="" class="previewImg">
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
  data () {
    return {
      activeIndex: '0',
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        pics: [],
        // 商品介绍
        goods_introduce: '',
        attrs: []
      },
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      cateList: [],
      cascaderProps: {
        expandTrigger: 'hover',
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      manyList: [],
      onlyList: [],
      // 图片上传请求头
      headersObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      // 图片预览地址
      previewUrl: '',
      previewVisible: false
    }
  },
  created () {
    this.getCateList()
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length >= 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    },
    uploadUrl () {
      return this.$http.defaults.baseURL + 'upload'
    }
  },
  methods: {
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类列表失败！')
      }
      this.cateList = res.data
    },
    handleChange () {
      if (this.addForm.goods_cat.length < 3) {
        this.addForm.goods_cat = []
        return false
      }
      console.log(this.addForm.goods_cat)
    },
    beforeTabLeave (activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length < 3) {
        this.$message.error('请先选择商品分类！')
        return false
      }
    },
    async tabClicked () {
      // 动态参数面板
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: {
              sel: 'many'
            }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数失败！')
        }
        res.data.forEach((element) => {
          element.attr_vals = element.attr_vals
            ? element.attr_vals.split(' ')
            : []
        })
        this.manyList = res.data
        console.log(this.manyList)
      } else if (this.activeIndex === '2') {
        // 静态属性
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: {
              sel: 'only'
            }
          }
        )

        console.log(res)
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性失败！')
        }
        this.onlyList = res.data
        console.log(this.onlyList)
      }
    },
    // 预览事件
    handlePreview (file) {
      this.previewUrl = file.response.data.url

      this.previewVisible = true
    },
    // 移除事件
    handleRemove (file) {
      const filePath = file.response.data.tmp_path
      // 获取图片索引
      const i = this.addForm.pics.findIndex((e) => e.pic === filePath)
      this.addForm.pics.splice(i, 1)
    },
    // 图片上传成功
    handleSuccess (response) {
      if (response.meta.status !== 200) { return this.$message.error('上传图片失败！') }
      const imgInfo = {
        pic: response.data.tmp_path
      }
      this.addForm.pics.push(imgInfo)
      console.log(this.addForm)
    },
    // 添加商品
    addProduce () {
      // 进行表单校验
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return this.$message.error('请填写必要表单项！')
        // 添加动态参数
        this.manyList.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })

        // 添加动态参数
        this.onlyList.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })

        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        console.log(form)

        // 添加商品
        // 商品名称是唯一的，否则添加失败
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) return this.$message.error('添加商品失败！')

        this.$message.success('添加商品成功！')

        this.$router.push('/goods')
      })
    }
  }
}
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previewImg {
    width: 100%;
}
.btnAdd {
    margin-top: 15px;
}
</style>
